What is Propylene Gas?

Propylene or Propene, is an alkene and unsaturated organic compound. Differently from Propane, it has a double bond that gives it a combustion advantage i.e. it burns hotter. The dominant technology for producing propylene is steam cracking. The same technology is applied to ethane to ethylene. Propene is the second most important starting product in the petrochemical industry after ethylene. It is the raw material for a wide variety of products.

How do you separate Propylene?

Separating propylene/propane mixtures is one of the most challenging processes in the petrochemical industry. Propylene can be separated by fractional distillation from hydrocarbon mixtures obtained from cracking and other refining processes. Currently, the most widely used propene separation method by industry is cryogenic distillation.

Propylene (C3H6) Gas

Propylene (C3H6) is a colorless, flammable, liquefied gas with a detectable odor.

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Propylene

Formula: C₃H₆

CAS No: 115-07-1

Propylene (C₃H₆), also known as propene, is a colorless, flammable hydrocarbon gas widely used as a petrochemical feedstock and fuel gas. It is a key building block in the production of polypropylene and numerous chemical intermediates.

In industrial applications, propylene is also used in welding and cutting gases, as well as in polymer manufacturing. Its reactivity and versatility make it one of the most important hydrocarbons in modern chemical production.

Applications include:

Primary feedstock for polypropylene and other polymer production.
Used in the manufacture of chemicals such as propylene oxide, acrylonitrile, and alcohols.
Applied in metal cutting, welding, and heating applications.
Used as a fuel gas in industrial and laboratory environments.
Supports specialty chemical and materials processing applications.

EFC Gases & Advanced Materials supplies high-purity propylene with tight control of moisture and critical impurities to ensure consistent performance in demanding applications.

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Applications

Specifications

Further Specifications

Cylinder Sizes

Produce polypropylene and polymers.
Manufacture chemical intermediates.
Cut, weld, and heat materials.
Fuel industrial and lab systems.
Support specialty chemical processing.

	Grade 2	Grade 3	Grade 3.5	Grade 3.7	Grade 4	Grade 4.5
Purity	99.0%	99.9%	99.95%	99.97%	99.99%	99.995%
Nitrogen	< 100 ppmv	< 20 ppmv	< 10 ppmv	< 10 ppmv	< 5 ppmv	< 5 ppmv
Oxygen	< 5 ppmv	< 2ppmv	< 2ppmv	< 2ppmv	<1 ppmv	< 1 ppmv
Carbon Dioxide	< 10 ppmv	< 4 ppmv	< 2 ppmv	< 1 ppmv	< 1 ppmv	< 1 ppmv
Other Hydrocarbons	< 9000 ppmv	< 950 ppmv	< 470 ppmv	< 290 ppmv	< 90 ppmv	< 45 ppmv
Moisture	< 10 ppmv	< 4 ppmv	< 3 ppmv	< 3 ppmv	< 2 ppmv	< 2 ppmv
Total Impurities	< 1 %	< 1000 ppmv	< 500 ppmv	< 300 ppmv	< 100 ppmv	< 50 ppmv

Chemical & Physical Properties
Molecular Weight	42.08
Specific Volume	9.4 cu cf/lb
Pressure @ 70° F	136.6 psig
Flammability Limits	2.0 - 11.0% in air
Valve Outlet	CGA 350/510 LB CGA 170

Shipping Information
DOT Name	Propylene
Hazard Class	2.1
DOT No.	UN 1077
DOT Label	Flammable Gas
CAS No.	115-07-1

Cylinder Size	Fill Weight (lb)
1/2 Ton	430
LP30	105
LP15	50
LP05	20
LP01	5
49L/Size 300	45
44L/Size 200	40
16L/Size 80	15
7L/Size 35	6

Moisture level guaranteed only when EFC Gases & Advanced Materials prepares the cylinders.
All concentrations are on a mol/mol basis unless otherwise stated.

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